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QED (text editor)

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This is an old revision of this page, as edited by 134.117.137.79 (talk) at 23:49, 11 March 2003. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

QED is a line-oriented computer text editor.

Originally written by Butler Lampson and Peter Deutsch for the SDS 940 (in the 1960s?). Ken Thompson later wrote a version for CTSS; this version was notable for introducing regular expressions. QED influenced the classic UNIX text editor ed and the less well known sam by Rob Pike. A Canadian version of QED named FRED (Friendly Editor) was written at the University of Waterloo for Honeywell GCOSsystems by Peter Fraser.

See also: QED for other uses of "QED".

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